Can you think of any three-dimensional shape that comprises of exactly two surfaces?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

Thirty friends were on a hiking trip when they decided to enjoy the bonfire. They assembled for it and agreed to play a game. For that, they divided themselves into five teams with seven members each, forming five rows.

How did they manage to achieve this formation?

The horse jumps over the king.
Strangely there is absolutely no scratch on him.

Can anyone explain, how is this possible?

What number when divided in half becomes zero?

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?

On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.

Is this even possible? How can it be?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?